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Kathy89

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DVR box makes a high frequency sound

 Is this normal?  When the TV is on, the sound can't be heard but when the TV is turned off it's very noticeable as a high pitch frequency sound.  Only had the new DVR box one week.

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Sandy7

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My cable box does this too. The cable box, TV, sound system, etc are all turned off. Every 2-3 minutes there is a loud whirling sound, like the sound an old computer made when you inserted a CD and it started to spin. It's not white noise. 

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ChrisL

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Sandy7 said:

My cable box does this too. The cable box, TV, sound system, etc are all turned off. Every 2-3 minutes there is a loud whirling sound, like the sound an old computer made when you inserted a CD and it started to spin. It's not white noise. 

If it's a DVR box you have it's possible you're hearing the hard drive spinning up. 

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